| 刘薇,叶鸣,陶冶,杨放,王纯,谢拥军.微波近场同轴探头液体浓度检测研究[J].电子测量与仪器学报,2025,39(4):225-233 |
| 微波近场同轴探头液体浓度检测研究 |
| Research on liquid concentration detection based onmicrowave near-field coaxial probe |
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| DOI： |
| 中文关键词: 液体浓度 微波检测 谐振式微波近场同轴探头 耦合间隙 |
| 英文关键词:liquid concentration microwave sensing resonant microwave near-field coaxial probe coupling gap |
| 基金项目: |
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| Author | Institution |
| Liu Wei | School of Information and Control Engineering, Xi′an University of Architecture and Technology, Xi′an 710055,China |
| Ye Ming | School of Information and Control Engineering, Xi′an University of Architecture and Technology, Xi′an 710055,China |
| Tao Ye | School of Information and Control Engineering, Xi′an University of Architecture and Technology, Xi′an 710055,China |
| Yang Fang | School of Information and Control Engineering, Xi′an University of Architecture and Technology, Xi′an 710055,China |
| Wang Chun | School of Information and Control Engineering, Xi′an University of Architecture and Technology, Xi′an 710055,China |
| Xie Yongjun | School of Electronic Information Engineering, Beihang University, Beijing 100191, China |
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| 摘要点击次数: 28 |
| 全文下载次数: 49 |
| 中文摘要: |
| 液体浓度检测广泛应用于食品、环境、生物医学等领域。基于微波法，设计并实现了一种谐振式同轴探头液体浓度检测装置。首先，选取不同浓度的乙醇 水混合溶液作为测试对象，仿真分析耦合间隙、探头浸没深度及探头导体材质对检测灵敏度的影响。为验证装置对不同液体浓度检测的适用性，以0%~75%乙醇-水溶液和0%~50%葡萄糖-水溶液为对象进行了实验验证。实验结果表明，该探头能够精确测量液体浓度，并且通过调整耦合间隙，可优化不同浓度范围内的检测灵敏度。此外，综合谐振频率、S11幅度最小值和品质因子3种电磁参数，构建了溶液浓度的定量反演模型，与仅使用谐振频率单一参数的传统方法相比，检测乙醇-水溶液和葡萄糖 水溶液的相对误差分别从5.79%和3.34%降低至2.19%和1.36%。探头还能够有效区分多种透明液体，如乙醇溶液、葡萄糖溶液、盐水、自来水和去离子水等，表现出良好的识别能力和数据重复性，具有广泛的潜在应用前景。 |
| 英文摘要: |
| Liquid concentration detection is widely used in food, environment, biomedical and other fields. Based on the microwave method, a resonant coaxial probe liquid concentration detection device was studied, designed and realized. Firstly, ethanol-water solutions of different concentrations are selected as test samples, and the effects of coupling gap, probe immersion depth and probe conductor material on detection sensitivity are simulated and analyzed. To verify the feasibility of liquid concentration detection using the designed probe, ethanol-water solutions/glucose-water solutions with a volume concentration of 0%~75%/0%~50% are measured. The experimental results show that the probe is capable of accurately measuring the liquid concentration and the detection sensitivity in different concentration ranges can be optimized by adjusting the coupling gap. In addition, in this study, the quantitative inversion model of solution concentration is constructed by combining three electromagnetic parameters, namely, resonance frequency, S11 amplitude minima and quality factor. Compared with traditional method that only use resonance frequency as indicator, relative errors of liquid concentration of ethanol-water solutions/glucose-water solutions are suppressed from 5.79%/3.34% to 2.19%/1.36%, respectively. The probe is also able to effectively differentiate a variety of transparent liquids, such as ethanol solutions, glucose solution, salt water, tap water and deionized water, etc., showing good recognition ability and data reproducibility and thus shows a wide range of potential applications. |
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